Chronic transfusion regimens lead inevitably to iron overload, causing
progressive organ dysfunctions and limiting life expectancy, so that
iron chelation is needed in multiple-transfused patients to reduce iro
n accumulation and toxicity. Desferal(R) is still the most used and th
e most efficacious chelator. It must be, however, administered through
subcutaneous infusion over 8-12 hours. Difficulties with compliance h
ave prompted an ongoing search for alternatives, and in particular for
molecules active after oral administration. The only drug available t
oday is L1. This drug is less active than Desferal(R), and is responsi
ble for rare agranulocytosis. Its indications are still to be discusse
d. (C) 1998 Elsevier, Paris.